Current Path : /sys/x86/bios/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/x86/bios/smbios.c |
/*- * Copyright (c) 2003 Matthew N. Dodd <winter@jurai.net> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/x86/bios/smbios.c 196403 2009-08-20 19:17:53Z jhb $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/socket.h> #include <sys/module.h> #include <sys/bus.h> #include <machine/bus.h> #include <machine/resource.h> #include <sys/rman.h> #include <vm/vm.h> #include <vm/vm_param.h> #include <vm/pmap.h> #include <machine/md_var.h> #include <machine/pc/bios.h> /* * System Management BIOS Reference Specification, v2.4 Final * http://www.dmtf.org/standards/published_documents/DSP0134.pdf */ /* * SMBIOS Entry Point Structure */ struct smbios_eps { u_int8_t Anchor[4]; /* '_SM_' */ u_int8_t Checksum; u_int8_t Length; u_int8_t SMBIOS_Major; u_int8_t SMBIOS_Minor; u_int16_t Max_Size; u_int8_t Revision; u_int8_t Formatted_Area[5]; u_int8_t Intermediate_Anchor[5]; /* '_DMI_' */ u_int8_t Intermediate_Checksum; u_int16_t Structure_Table_Length; u_int32_t Structure_Table_Address; u_int16_t Structure_Count; u_int8_t SMBIOS_BCD_Revision; } __packed; struct smbios_softc { device_t dev; struct resource * res; int rid; struct smbios_eps * eps; }; #define SMBIOS_START 0xf0000 #define SMBIOS_STEP 0x10 #define SMBIOS_OFF 0 #define SMBIOS_LEN 4 #define SMBIOS_SIG "_SM_" #define RES2EPS(res) ((struct smbios_eps *)rman_get_virtual(res)) #define ADDR2EPS(addr) ((struct smbios_eps *)BIOS_PADDRTOVADDR(addr)) static devclass_t smbios_devclass; static void smbios_identify (driver_t *, device_t); static int smbios_probe (device_t); static int smbios_attach (device_t); static int smbios_detach (device_t); static int smbios_modevent (module_t, int, void *); static int smbios_cksum (struct smbios_eps *); static void smbios_identify (driver_t *driver, device_t parent) { device_t child; u_int32_t addr; int length; int rid; if (!device_is_alive(parent)) return; addr = bios_sigsearch(SMBIOS_START, SMBIOS_SIG, SMBIOS_LEN, SMBIOS_STEP, SMBIOS_OFF); if (addr != 0) { rid = 0; length = ADDR2EPS(addr)->Length; if (length != 0x1f) { u_int8_t major, minor; major = ADDR2EPS(addr)->SMBIOS_Major; minor = ADDR2EPS(addr)->SMBIOS_Minor; /* SMBIOS v2.1 implementation might use 0x1e. */ if (length == 0x1e && major == 2 && minor == 1) length = 0x1f; else return; } child = BUS_ADD_CHILD(parent, 5, "smbios", -1); device_set_driver(child, driver); bus_set_resource(child, SYS_RES_MEMORY, rid, addr, length); device_set_desc(child, "System Management BIOS"); } return; } static int smbios_probe (device_t dev) { struct resource *res; int rid; int error; error = 0; rid = 0; res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); if (res == NULL) { device_printf(dev, "Unable to allocate memory resource.\n"); error = ENOMEM; goto bad; } if (smbios_cksum(RES2EPS(res))) { device_printf(dev, "SMBIOS checksum failed.\n"); error = ENXIO; goto bad; } bad: if (res) bus_release_resource(dev, SYS_RES_MEMORY, rid, res); return (error); } static int smbios_attach (device_t dev) { struct smbios_softc *sc; int error; sc = device_get_softc(dev); error = 0; sc->dev = dev; sc->rid = 0; sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid, RF_ACTIVE); if (sc->res == NULL) { device_printf(dev, "Unable to allocate memory resource.\n"); error = ENOMEM; goto bad; } sc->eps = RES2EPS(sc->res); device_printf(dev, "Version: %u.%u", sc->eps->SMBIOS_Major, sc->eps->SMBIOS_Minor); if (bcd2bin(sc->eps->SMBIOS_BCD_Revision)) printf(", BCD Revision: %u.%u", bcd2bin(sc->eps->SMBIOS_BCD_Revision >> 4), bcd2bin(sc->eps->SMBIOS_BCD_Revision & 0x0f)); printf("\n"); return (0); bad: if (sc->res) bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res); return (error); } static int smbios_detach (device_t dev) { struct smbios_softc *sc; sc = device_get_softc(dev); if (sc->res) bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res); return (0); } static int smbios_modevent (mod, what, arg) module_t mod; int what; void * arg; { device_t * devs; int count; int i; switch (what) { case MOD_LOAD: break; case MOD_UNLOAD: devclass_get_devices(smbios_devclass, &devs, &count); for (i = 0; i < count; i++) { device_delete_child(device_get_parent(devs[i]), devs[i]); } break; default: break; } return (0); } static device_method_t smbios_methods[] = { /* Device interface */ DEVMETHOD(device_identify, smbios_identify), DEVMETHOD(device_probe, smbios_probe), DEVMETHOD(device_attach, smbios_attach), DEVMETHOD(device_detach, smbios_detach), { 0, 0 } }; static driver_t smbios_driver = { "smbios", smbios_methods, sizeof(struct smbios_softc), }; DRIVER_MODULE(smbios, nexus, smbios_driver, smbios_devclass, smbios_modevent, 0); MODULE_VERSION(smbios, 1); static int smbios_cksum (struct smbios_eps *e) { u_int8_t *ptr; u_int8_t cksum; int i; ptr = (u_int8_t *)e; cksum = 0; for (i = 0; i < e->Length; i++) { cksum += ptr[i]; } return (cksum); }